i had previously posted 3k-4k hesitation, i didnt get any response. i think you guys thought i may have had the 3800 rpm problem. i know their a million posts regarding this, i have perfrormed all the things that could prevent the 3800 rpm problem(i did my research before i posted), but the problem i am having is very similar, if i rev up to exactly 3600 rpm the car will lean out but after 4k it will pull like theirs no tomorrow.
i checked for all noticeable probelm but found nothing wrong, the only thing that i might have overlooked is grounding other wires to the ecu, i followed the write about grounding your car, but reading other posts i found that their are more than wire that has to be regrounded on the ecu, i have searced all over and cant find a diagram, i even checked the fsm but cant find anything(maybe im slow and missed something in the fsm).
im also wondering if the ecu doesnt get proper ground can it get damaged, when i checked for resistance from the ground wire to ecu, the resitance was fairly low.
Im totally confused what the problem might be, im planning on going microtech next year and i know it will probably fix the problem, but i would like to be able take the car for a few more rips before winter comes and my cars stored.
any suggestions will be much appreciated, thanx

 

oh yeah forgot to mentio its an 87 TII, fmic, upgraded garret grand national turbo, walbro 255, fuel presure regulator. these are the only upgrades i think should affect it, oh yeah and stock ecu(332)

 

well a fuel pump doesnt do any good if you dont have injectors you might want to try getting some or tuning your car.

 

i know, i plan on going 1600cc when i go microtech, my boost is only set at 5psi.
the car is setup properly boost and fuel wise until i have the money for microtech and injectors.
car is not leaning out after 4k just at exactly 3600 rpm, after 4k the car is running richer than a ****.

 

try setting up the boost up back to stock

 

this problem didnt happen after all the upgrades, it was working perfectly with 5psi of boost, it doesnt seem to be a boost problem because when i slowly rev it up to 3600 (in neutral)it will lean out than run rich again when i pass 4k, but than again i may be wrong about it being a boost problem.
the weird thing is if im driving slowly and pass 3600 rpm it wont do it soon as i slam on the gas it hesitates like crazy unti i pass 4k, the only thing i can think is when the walbro fuel pump switches from 9v to i think 13 volts or 12 volts at wot, its doing something wonky.

 

can someone please help, any suggestion will be much appreciated

 

I dont know what it might be... but you should check that you dont have any vac leaks and make sure your engine it self is grounded correctly

 

You may have partially clogged primary injectors..

You know...The ones we all try to ignore because we have to remove everything to get down to them.

 

i thought those were the secondary........

 

i had checked for any vacuum leaks as well i had re-grounded my engine and the firewall, but i think you might be right SureShot about the clogged injectors, i had already tried using redline injector cleaner, but i think i have to take apart my intake manifold and rip out my injectors to get them serviced. ill probably wait till winters over when i go 1600c secondarys and microtech, but if my primarys are clogged or are in bad shape can i use my stock secondarys as my primarys(are they the exact same injectors and are they all 550)

 

Out of curiosity, is that your red TII in your sig? And also, the other wiper is just too far down to see, right?

 

i like it, a lil. it's very uhh, what's the expression... la mans-ish?

 

o.k. i admit the single wiper was a very bad idea, i guess i was going through a strange phase with my car.
im back to the double wiper, i think im going to take another picture of my car how it is now with the double wiper(how it should be).ot photoshop it out

 

BUMP